while it is true the can just hop on the internet, half the info out there is incorrect. so with you, they are learning the correct way to treat/care for/etc. a chinchilla. in my mind, i don't see a difference between going to a book, internet or asking someone with vast knoweldge. granted they dont' have to read read and read... and going to you makes it easier, but again, its still reseach [they had to search you out] and some day that information you are giving them, might just save a chins life.
herees an idea, not sure if its a good one ask for their address and send them your booklet on chincare, then they will have to read.